One of the best-known office buildings in downtown San Diego was recently acquired by a partnership of BBL Commercial Real Estate of San Diego and Westbrook Partners. The buyer shelled out $39.25 million for the Fifth Avenue Financial Center. The two parties involved in the acquisition each represented themselves and all leasing activity at the building will henceforth be handled by real estate brokerage Cassidy Turley.

After a half-century of family ownership, the downtown San Diego property popularly known as “Mister A.’s Building” is changing hands.

In a $39.25 million deal, BBL Commercial Real Estate and Westbrook Partners have acquired the 140,832-square-foot office building at 2550 Fifth Avenue. The parties involved in the transaction represented themselves, and Cassidy Turley will serve as the property’s leasing representative.

Formally known as Fifth Avenue Financial Center, the 13-story building earned its nickname from its rooftop restaurant, Bertrand at Mister A’s. The building’s namesake eatery will retain its location.

The propertu is currently 74 percent occupied. According to rentv.com, many current tenants have occupied their spaces for the past three decades.

BBL and Westbrook’s plans include the addition of a 5,000-square-foot restaurant and a brew pub, The San Diego Union-Tribune. Also in the works are street-level retail and a variety of amenities. BBL and Westbrook have yet to name the consultants that will handle the makeover.